MAUDE Adverse Event Report: Cochlear Ltd Nucleus CI622 Cochlear Implant with Slim Straight Electrode; Nucleus 24 Cochlear Implant System

Model Number	CI622
Medical Device Problem Code	Unexpected Therapeutic Results (1631)
Health Effect - Clinical Code	Appropriate Clinical Signs, Symptoms and Conditions Term/Code Not Available (4581)
Date of Event	06/12/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
Per the clinic, the device was explanted on (b)(6) 2026 due to the poor sound quality.There are no plans to reimplant the patient with a new device as of the date of this report.Additional information has been requested but has not been made available as of the date of this report.

• Brand Name: Nucleus CI622 Cochlear Implant with Slim Straight Electrode
• Common Device Name: Nucleus 24 Cochlear Implant System
• Manufacturer (Section D): Cochlear Ltd; 1 university avenue; macquarie university, nsw 2109 ; AS 2109
• MDR Report Key: 50928074
• Report Number: 6000034-2026-03400
• Device Sequence Number: 16136150
• Product Code: MCM
• UDI-Device Identifier: 09321502036573
• Combination Product (Y/N): N
• Initial Reporter State: UT
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Importer
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 09/29/2026
• Report Date (Section F): 09/29/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Operator of Device: Lay User/Patient
• Device Expiration Date: 05/11/2025
• Device Model Number: CI622
• Was Device Available for Evaluation?: Yes
• Date Returned to Manufacturer: 08/27/2026
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 09/02/2026
• Date Report to Manufacturer: 09/02/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 09/29/2026
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Female
• Date Report Sent to FDA: 09/29/2026